Version 0.11a of the MP3 Factory script is now available. The link is in the MP3 Factory: 'De-borking' MP3s on Linux page.
This version fixes a bug that caused the processing of multiple files to fail if they had different file extensions. Also the temporary copy of the file that is being processed is now stored in RAM (/run/user/$UID/mp3f_tmp) which greatly reduces storage reads and writes and speeds up processing a bit.
Various other smaller changes were made as well.